Cement for filling voids in brass castings



I hydrated lime will also serve.

UNITED STATES RAYMOND SAMUEL WILE,

OF NEW YORK, N. Y.

CEMENT FOR FILLING VOIDS IN BRASS CASTINGS.

No Drawing.

To all whom it may concern:

Be it known that I, RAYMOND SAMUEL WILE, a citizen of the United States, residing at the borough of Manhattan, in the county of New York and State of New York, have invented new and useful Improvements in a Cement for Filling Voids in Brass Castings, of which the following is a specification.

This invention relates to a process of removing defects in brass castings or rolls by filling the holes or voids therein with abrass cement for the purpose of perfecting such castings or rolls and making the same substantially as good as a casting or roll is when perfectly cast and new and useful composition of matter used therefor.

Hitherto when brass castings or rolls were defective b reason of blow holes or voids therein, it as been customary to heat them, break them up, and remelt them, which resulted in considerable financial loss.

My process consists in the formation of a cement composed of brass rindings or dis integrated brass mixed wit not more than ten per cent. of its weight of lime, preferably finely ground burnt lime, and by adding thereto sufficient phosphoric acid to moisten the mixture just prior to the application thereof to the casting or roll. An alternative is to mix these brass grindings with not more than ten per cent. of aluminum phosphate and zinc oxid and adding sufiicient water thereto to moisten the same before a plying the mixture to the castin or roll. hese grindings may also be mixe with not more than ten per cent. of aluminum oxid, zinc oxid, and mixed with sufficient phosphoric acid to moisten the same before the mixture is used. Lime can be added to any of the above mixtures and while burnt lime is preferable, limestone or Magnesia serves but not so well as lime. After the cement is prepared as aforesaid, it is manually or otherwise placed in the holes or voids Specification of Letters Patent.

Patented Nov. 16, 1920.

Application filed October 10, 1919. Serial No. 829,841.

of the casting or roll and about an hour after it has set, it is heated with a blow torch or other suitable means for the purpose of driving out moisture and causing permanent hardness. The mixturecan be made to correspond with the color of w the particular grade of brass or bronze which it is intended to repair by selecting grindings of the same color as the castings. This invention 1s particularly applicable to castings for paper mills and especially to iolls used.

therein, which are generally made of brass or bronze and frequently come out of the castlng process .with holes through. them wh1ch are apparent when the rolls are turned down for the purpose of causing a smooth rolling surface, though it has a wide application in all brass foundries.

Havmg thus described my invention, what I claim and desire to secure by Letters Patent is:

1. The process of removing defects in brass castings or rolls first, by forming a cement of finely divided brass combined with cementitious material having the property of hardening under the application of heat, then applying such cement to the voids or holes in the castin or roll and then drying and hardening t e same by the appli cation of heat thereto substantially as described. 2. A cement for filling voids in brass castmgs consisting of brass grindings or other finely divided brass mixed with an aluminum derivative, zinc oxid and phosphoric acid, substantially as described.

3. A cement for filling voids in brass castings consisting of brass grindings or other finely divided brass mixed with aluminum phosphate, zinc oxid, phosphoric acid, and water, substantially as described.

RAYMOND SAMUEL WILE.

Witnesses:

SADIE TEBER, HENRY D. Donmmr. 

